ntpd in NTP 4.x before 4.2.8p8 allows remote attackers to cause a denial of service (ephemeral-association demobilization) by sending a spoofed crypto-NAK packet with incorrect authentication data at a certain time.
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2016-4953.json"